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RIOT Technology Corp.
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8.
Once the probe is fully inserted in the hole, pack the soil
around the top of the sensor to prevent water from entering
the hole. The sensor should be completely covered with soil
and only the sensor cable visible.
Auger Installation Method
1.
Drill a vertical hole with a 3 inch auger.
2.
Insert the sensor into the hole, making sure the entire sensor
body is in the hole.
3.
Make a slurry of the soil from the hole and pour it down slowly so that it settles evenly
around the sensor. Stop pouring every few inches and give it time for the water to drain
from the soil and the soil to settle. Allow more time for soils that retain water, such as
clay soils.
4.
Make sure the sensor is completely covered with soil and only the sensor cable visible.
Excavation Installation Method
1.
Dig a hole deep enough for the sensor probe and save the soil.
2.
Place the sensor probe vertically in the hole.
3.
While supporting the sensor at the top and bottom so that it does not move, backfill the
hole with the soil that was removed from the hole, using the same soil at each depth as
best as possible. Be sure to keep the sensor vertical while backfilling the hole.
4.
Pack the soil around and into the sensor so that there is good soil contact on all sensor
surfaces. The accuracy depends on not having any air gaps around the sensor.
5.
Pack the soil to the same density as it was before excavation. The sensor should be
completely covered with soil and only the sensor cable visible.
6.
Water the soil thoroughly after installation to help ensure that the soil has filled in
around the sensor
Removing the Sensor from the Soil
To remove a sensor probe from the soil:
1.
Carefully dig out the soil around the top of the probe with a hand shovel, being sure not
to damage the probe or cable. Dig out the hole until at least 30 cm (11.8 inches) of the
probe is exposed.
2.
Grasp the probe firmly with two hands as you pull it upwards. Do not grab onto the
black probe head as it is not secured with enough strength for probe extraction. Do not
pull the probe up by the sensor cable.
